WELCOME Physics 231 Scientific Method Physics The study

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WELCOME ! Physics 231

WELCOME ! Physics 231

Scientific Method � � Physics- The study of matter and energy and their interaction

Scientific Method � � Physics- The study of matter and energy and their interaction between each other. Physicists analyze nature to understand how the universe behaves. This is done in a systematic way known as the scientific method which relies on facts, laws, hypothesizes, and theories. Hypothesis are formed using known facts, tested via experimentation, analyzed via known laws, and theories are ultimately formed.

Scientific Method � � � Fact- A truth statement void of any predictive capability.

Scientific Method � � � Fact- A truth statement void of any predictive capability. Law- A pattern in nature capable of being described mathematically. Hypothesis- An educated guess based on observations conducted prior to experimentation. Theory- An educated analysis based on evidence conducted after many experimentations. Theories do not become facts or laws.

Scientific Method � In order for a hypothesis to become a theory, many experiments

Scientific Method � In order for a hypothesis to become a theory, many experiments must be conducted by many people in various conditions all which yield equivalent results. � A theory can be thought of as a model based on evidence and experimental data that explains the relationship between facts and provides predictive insight.

Scientific Method

Scientific Method

General Information � Examples of established theories in physics: � Photoelectric Theory � Quantum

General Information � Examples of established theories in physics: � Photoelectric Theory � Quantum Field Theory � Theory of Thermodynamics � Theory of Relativity � The Wave-Particle Duality Theory of Light � Electromagnetic Theory � Gravitational Theory

General Information � Gravitational Theory- The study of the natural phenomenon of all physical

General Information � Gravitational Theory- The study of the natural phenomenon of all physical bodies to be attracted to one another. � Quantity- A measurable property.

S. I. Base Units

S. I. Base Units

S. I. Base Units

S. I. Base Units

General Information The International System of Units (S. I. ), commonly referred to as

General Information The International System of Units (S. I. ), commonly referred to as the metric system is used by all branches of science including physics in nearly every country. SI prefixes in everyday use Text Symbol Factor tera T 1000000 giga G 100000 mega M 1000000 kilo k 1000 hecto h 100 (none) 1 centi c 0. 01 milli m 0. 001 micro μ 0. 000001 nano n 0. 00001

Scientific Notation

Scientific Notation

Scientific Notation

Scientific Notation

Algebra is the study of operations and is used to refer to unknown or

Algebra is the study of operations and is used to refer to unknown or changing quantities as symbols instead of numbers. Algebra also allows us to manipulate the relationships between these variables in order to discover new relationships.

Algebra

Algebra

Trigonometry allows us to describe triangles. Trigonometry also allows us to describe any property

Trigonometry allows us to describe triangles. Trigonometry also allows us to describe any property of matter or energy that undergoes repetitive periodic motion in terms of an ever changing angle on a right triangle within a unit circle.

Trigonometry

Trigonometry

Trigonometry

Trigonometry

Trigonometry

Trigonometry

Trigonometry

Trigonometry

Trigonometry

Trigonometry

Calculus is the study of change. Calculus allows us to deal with infinities in

Calculus is the study of change. Calculus allows us to deal with infinities in nature.

Calculus • When solving for A, take the derivative of B with respect to

Calculus • When solving for A, take the derivative of B with respect to C. • When solving for either B or C, the integral of A must instead be taken.

Calculus • When integrating, keep these tips in mind: – What’s in location 1

Calculus • When integrating, keep these tips in mind: – What’s in location 1 and 2 must be the minimum and maximum of your variable. – What’s in location 4 must be the variable in question that you’ll be integrating with respect to. – Lastly, the function in location 3 should contain the same variable declared in location 4 and no other.

General Information • The practical purpose of physics is to be able to accurately

General Information • The practical purpose of physics is to be able to accurately and literally predict the future.